equison

noun /ɛˈkwaɪzən/

groom, ostler, equerry, jockey

Once indeed, I confess it, I was very near falling as low: words passed between me and the more favored man of letters, who announces to the world the Works and Days of Newmarket, — the competitors at its games, their horses, their equisons and colours, and the attendant votaries of that goddess who readily leaves Paphos or Amathus for this annual celebration.